Speed is relative and always a challenge.
The drama of competition can be captured in many ways. This image uses a slow SHUTTER speed and a panning action to blur the background. This helps to isolate the athlete and focus on his concentration.
A high SHUTTER speed would freeze the moment and reveal details like this image from the rodeo.
THINK before you make that choice so your vision will ring true from your work.
SHUTTER priority mode locks your shutter speed and automatically adjusts the aperture to ensure proper exposure. This setting can be used to control how the camera responds to moving subjects.
The racing wheelchair would need a slower shutter speed of around 1/60th to allow the background to swish.
The bronco on the other hand would need the maximum shutter speed possible under the conditions, in this case with overcast conditions and a maximum available aperture of f4 and iso 100, that would be 1/1000th.